JSFiddle - React, Tailwind, and code Playground

HTML

<div id="numbers">
  
</div>

JavaScript

numbers_x = [3.10, 3.1, 3.201];

function removeZeros(group) {
	var maxLength = 0;
  var newGroup = [];
	for(var x in group) {
    var str = group[x].toString().split('.')[1];
    if(str.length > maxLength) maxLength = str.length;
  }
  
  for(var y in group) {
  	var str = group[y].toString();
  	var substr = str.split('.')[1];
    if(substr.length < maxLength) {
    	for(var i = 0; i < (maxLength - substr.length); i++) 
      	str += '0';
    } 
    newGroup.push(str); 
  }
  
  return newGroup;
}

var newGroup = removeZeros(numbers_x);
for(var x in newGroup) {
	document.getElementById('numbers').innerHTML += newGroup[x]+'<br>';
}